Blackwell's Island Penitentiary, New York: prisoners in chains are working with hammers breaking stones on the side of the roadway, a guard in a jacket and trousers with a cane is watching over them from under a tree. Wood engraving after G.U. Régamey.

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Blackwell's Island Penitentiary, New York: prisoners in chains are working with hammers breaking stones on the side of the roadway, a guard in a jacket and trousers with a cane is watching over them from under a tree. Wood engraving after G.U. Régamey. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.